#include<iostream>
#include<stdio.h>
using namespace std;
#include <iomanip>

#include  <cmath>
int main() {
	float a, b, c, k, d;
	cin >> a >> b >> c;
	cout << setiosflags(ios::fixed) << setprecision(2);
	cout << "circumference" << a + b + c;
	k = a + b + c;
	d = sqrt(k * ((k - a) * (k - b) * (k - c)));
	cout << "area" << d;
}

